【摘要】 以玉蒙铁路DK125+20高路堑边坡工点为参考研究对象,通过大型振动台模型试验对双排桩支挡结构在不同地震加速度条件下的桩身受力、土体加速度、桩顶位移情况进行测试,进而分析双排桩支挡结构在高边坡中的支护效果。试验结果显示,双排桩支挡结构试验模型中桩后总土压力随地震加速度峰值增加而增加,且下排桩增幅大于上排桩;土体加速度随高度增加而增加,且震级越大,增加速率越大;当地震烈度达到9度时,双排桩支挡结构的支护效果也是理想的。更多还原

【Abstract】 Based on the worksite of double row pile retaining structure in the Yuxi to Mengzhi Railway,this paper takes out the shaking table test to analyze the force acting on the pile,the acceleration in the soil and the deformation at pile top of the double pile structure under different earthquake acceleration.And the support effect of the double row pile structure was analyzed.It shows that total force acting on the back of the pile is increase with the increasing of the earthquake acceleration,and the increment of the total force is greater on the lower pile than that on the upper pile.The peaks of acceleration in the soil are increased with the height of the soil in the model,and the greater the earthquake acceleration,the greater the increment.Even in the earthquake intensity up to 9th level,the support effect of double row pile retaining structure is still perfect.更多还原